Software. SCREEN BEAN INTRODUCTION — TEXT: How do we get data into the computer? How do we get data and information out of the computer? Software Application.

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Presentation transcript:

Software

SCREEN BEAN INTRODUCTION — TEXT: How do we get data into the computer? How do we get data and information out of the computer? Software Application Software Operating System Software

Software Software describes the programs installed on computers. Computers require two types of software: - operating system software - applications software

Figure 4.1 Categories of computer software

Figure 4.2 Diagram showing the relationships between the different types of software and hardware

Software: A series of detailed instructions that control the operation of a computer system. Software exists as programs that are developed by computer programmers. Systems software: This form of software manages and controls the operation of the computer system as it performs tasks on behalf of the user. Categories of software

Software Applications System Software / Operating Systems Application Software

Software Applications System software has no other purpose than to run the computer; but without it, you couldn’t use application software. DOS, Linux and Windows NT are system software. System software is often referred to as an Operating System (OS); software that provides network services, like Windows NT and Novell NetWare, is referred to as a Network Operating System (NOS).

Software Applications Application software is used for a purpose beyond merely operating the computer: for example, word-processors, spreadsheets, databases, , graphics and games programs - i.e. something useful! These programs are also referred to as software packages or software programs General Purpose applications: This is also known as productivity software and describes a category of computer software that aims to support users in performing a variety of common tasks. (e.g. word processor, spreadsheet, database). Application-specific software: This is intended to serve a specific purpose, for example software used in the marketing and accounting functions (see chapter 6 for more details).

Operating System Software… is busy behind the scenes, performing housekeeping tasks, enabling you to access programs, and managing files. It also ensures that everything is running properly.

Operating Systems Windows 7 (just released) Windows Vista, XP, Me, 2000, 98 & 98 SE, NT, 95 DOS UNIX Linux OSX (Lion, Leopard, Tiger etc) DOS Apple IOS Nokia RIM Android

Software Applications Word Processing – Word – WordPerfect – Ami Pro – Works

Software Applications Database Management – Access – Paradox – FileMaker Pro

Data warehouses, data mining and analytics Data warehouses are large database systems containing detailed company data on sales transactions which are analysed to assist in improving the marketing and financial performance of companies. Data mining of data warehouses is an attempt to identify a relationship between variables in order to assist decision making. It will involve statistical techniques such as multiple linear regression where a number of variables are compared to identify patterns. Analytics is a term that is used to describe various approaches to data-driven analysis.

Software Applications Graphics – Photoshop – Paintshop Pro

Software Applications Presentation Software – Microsoft PowerPoint – Lotus Freelance

Software Applications Desktop Publishing – Microsoft Publisher – Pagemaker

Software Applications Web Publishing – FrontPage – Dreamweaver

Software Applications – Microsoft Outlook – Microsoft Outlook Express

Software Applications Utilities – Anti-virus – Web popup blocker – Screen capture – PIM – Lotus, Contact Manager – Screen Savers

Internet concepts Internet: A global network system made up of many smaller systems. World Wide Web (WWW): Interlinked documents on the Internet made up of pages containing text, graphics and other elements. Hypertext Markup Language (HTML): WWW pages are mainly created by producing documents containing HTML commands that are special tags (or codes) to control how the WWW page will appear when displayed in a web browser. Web browser program: Enables users to navigate through the information available and display any pages of interest. Hypertext: Hypertext is highlighted words or phrases that represent links to other documents activated by clicking the mouse. Electronic mail ( ): The transmission of a message over a communications network.

Software distribution models Alternative models of software distribution include open source and application service providers. Open Source is a generic term used to describe software that is supplied to users completely free of charge and without restrictions limiting how it is used, modified or redistributed. In general, the source code for the program is freely available and users can modify it as they see fit. An application service provider (ASP) supplies software and services to a client organisation over a network, usually the Internet. Users access software and data via a web browser. This type of approach is often described as on-demand software or software as a service.